My mesh isn't moving with the bones
You need to do the following:


Apply all transformations to mesh and armature (select mesh/armature then CTRL+a)
Make the armature the parent of your Mesh. To do so in Object Mode select the badger mesh and then on the Object tab at the bottom there is a "Relations" menu. Open it and click on the "Parent" text box. Select the Armature object and set the option below to "Armature":

Then select your Armature and go to Pose Mode and select a bone which you want to assign to faces (here the head bone):

Then shift click on the badger mesh. With the mesh selected go to Weight Paint mode. Now you can assign faces to the done by "Painting" on the mesh. Assigned faces will become red:

With the faces assigned you can now go back to Pose Mode of the armature and the faces should follow deformations of the bones. Note the "Pose Position" selected in the panel to the right:



One advice: your mesh is very distorted and it will be hard to achieve something satisfying without some rework of the mesh. I did some cleanup, if you like I can share my edited mesh...